They are made of closed cell EVA foam materials that are easy to clean and highly stain resistant. Unlike carpet, they do not hold water and other odor causing substances. The sheets can be installed with our simple and robust peel-and-stick backing, requiring no mounting hardware. And they can easily be cut down to fit nearly any surface on a boat where non-skid, or protection for the boat's surface is required. The sheets can also cover up spider cracks, dents, cracks and other surface imperfections, helping to make it look brand new